About 10 years ago, and then again 5 years ago, I had lenses made up for me by Sea Vision in the States (http://www.seavisionusa.com/). I was very satisfied the first time around. The second time was fine but a MUCH more expensive exercise... in part my own fault because I insisted on sending them (from England) my prefered choice of dive mask for them to work on.

I've been using a Tusa Splendive IV mask, and also have a similar black silicone variant. Both are falling apart with age.

I now live in Hong Kong and it's high time I order a new mask with new prescription. Before I possibly go back to Sea Vision with my new order, I wouldn't mind researching the alternatives. So:

(a) can anyone recommend a good supplier of prescription dive masks/lenses (must be able to do international mail order)?

(B) which models of double-lens dive masks are currently considered to be the best for photographers?

Mark, my wife works at a dive shop; the vendor they use is prescriptiondivemasks.com .

Although I haven't used their services personally (I wear my contacts), this year I think I'll give it a try. Mostly what's pushing me to try is their workmanship, which is SUPERB.

I've looked over a couple of the masks that have come in for customers, and they look as if they came from the factory with the lenses. And they will work with any wierd thing you want...trifocals, blends, readers + lenses, anything that if you can describe it they'll make it.

For example, I'm considering a "cyclops lens", a lens optimised for the camera viewfinder focal distance, that would be in between my standard prescription lenses. That way, all I'd have to do is rotate my head a bit to look through it. The gal at prescriptiondivemasks said they hadn't done it yet, but didn't bat an eye at doing it.

Plus it is sooo nice to find the perfect mask, and have that be the one that gets the prescription.

Turnaround time has been about 10 days at the shop, including UPS both ways.

thanks for your feedback so far. I'll get in touch with all these guys (including Ozbob) but suspect I'll be going with prescriptiondivemasks.com who I see on their website have a nice selection of masks which look awfully similar to some of the branded models you'll find in your local dive shop.

Mark, if your mask (that fits perfectly now) is a major brand and common size/model, it would be worth it to ask if they could pick one up locally and put your scrip in. That way you'd have great fit and great lenses.

Having done it for a couple of folks, though, the best optical performance comes from using your mask, placed on your face, and marking the eye positions on the glass with a sharpie.

thanks guys for your comments. I'm gonna give prescriptiondivemasks.com a try. Depending on what they say, I might just email them a 1:1 outline of the lenses with my eye positions marked on each, and ask them to pick up the same mask locally.

I wore gas perm contacts for thirty years before my recent cataract surgery. I always thought soft contacts weren't available for astigmatism but just got them for diving and they work great. Very comfortable too.